초록 ▼

An electric micrometer with a U-shaped frame has a contact-type rotary encoder comprising a disk which has conductor patterns thereon, and a rotary brush holder which holds rotary brush contacts. The rotary brush holder is rotated by rotation of a spindle. A coupler connects a sleeve journaled to th

An electric micrometer with a U-shaped frame has a contact-type rotary encoder comprising a disk which has conductor patterns thereon, and a rotary brush holder which holds rotary brush contacts. The rotary brush holder is rotated by rotation of a spindle. A coupler connects a sleeve journaled to the spindle with the rotary brush holder so that the rotary brush holder rotates together with the sleeve and the spindle but need not have the same rotational axis as the sleeve. Integral to the frame is a count-and-control circuit which counts the output signal of the rotary encoder and indirectly computes a distance between the frame and an end of the spindle, and a digital indicator which is disposed on a part of the frame and indicates the computed distance.

대표청구항 ▼

An electric micrometer comprising: a U-shaped frame having first and second arms, an anvil held by a first arm of said frame, a spindle screw-movably held by said second arm of said frame, a sleeve rotatably held by said second arm in such a manner to be rotated coaxially with said spindle without a

An electric micrometer comprising: a U-shaped frame having first and second arms, an anvil held by a first arm of said frame, a spindle screw-movably held by said second arm of said frame, a sleeve rotatably held by said second arm in such a manner to be rotated coaxially with said spindle without an axial advancing, a contact type rotary encoder which comprises a disk substrate provided with conductor patterns thereon fixed to said arm of said frame, and a rotary brush holder provided with rotary brush contacts being mounted to link to said sleeve, a count-and-control circuit means contained in said frame for counting output signals of said rotary encoder and proceeding with a predetermined control, digital indicator means disposed in said frame for indicating measured results issued from said count-and-control circuit, and wherein said brush holder is linked to said sleeve by means of a shaft coupler provided with at least a spring means disposed between said sleeve and said brush holder for preventing back-lash.